Actually, in that case our friend is ADAF, his Dad was also a USAFA grad, and their son knew they wanted to fly fixed wing, he wanted USNA more, but would have been happy at USAFA too. He never expected a principal (CO is a competitive state for USAFA) so he placed USNA as his top on all 3, and USAFA as number 2. Whereas, they came to find out the other candidate did the rotate number 1 on their list for each MoC. Thus, it was actually a domino effect. She placed USNA as her top choice and the only other slot to give him a principal was USAFA because he never placed any other SA on his list besides AF and USNA.